JP3195881B2 - Photoelectrically separated smoke detector and receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photoelectric separation type smoke detector in which a transmitter and a receiver for smoke detection are separated, and a receiving apparatus for receiving various information from the photoelectric separation type smoke detector.

[0002]

2. Description of the Related Art Conventionally, a photodetector of a photoelectric separation type smoke detector transmits a fire signal or a failure signal to a receiver when a fire or a failure is detected, and receives a signal, for example, a photoelectric device. A fire signal and a failure signal were also sent to a tester for performing an operation test of the separated type smoke detector to indicate that it was a fire or a failure.

[0003] That is, as shown in FIG.
Detects a fire, sends a fire signal to the receiver 6 via the fire signal line 29A and the common line 29B, and turns on the fire switch 5 to send the fire signal to the tester 1.
In this case, power is supplied from the power terminals 7 and 8 of the receiver 6 to the power terminals 9 and 10 of the tester 1, and the power terminal 9 is one of the terminals 11 and 12 of the fire switch 5.
It is connected to the. Therefore, the tester 1 includes the light receiver 3
When a fire signal is received from, the LED 13 for fire is turned on to indicate that it is a fire.

When the photodetector 3 detects a fault, it sends a fault signal to the receiver 6 via the fault signal line 29C, turns on the fault switch 14 and sends the fault signal to the tester 1. Also in this case, power is supplied to one of the terminals 15 and 16 of the failure switch 14 via the power supply terminal 9. Therefore, when the tester 1 receives the failure signal from the light receiver 3, the tester 1
Is lit to indicate that a fault has occurred.

In order to perform an operation test of the photoelectric separation type smoke detector, a test switch 2 provided in the tester 1 is turned on, and a test signal is received by the light receiver 3 of the photoelectric separation type smoke detector. Is sent to the test terminal 4. When receiving the test signal from the tester 1 via the test terminal 4, the light receiver 3 simulates a fire state, turns on the fire switch 5, and sends out the fire signal to the tester 1. Upon receiving the fire signal from the light receiver 3, the tester 1 turns on the fire LED 13 to indicate that the light receiver 3 has been normally operated.

When the monitor jack 18 provided in the tester 1 is connected, the monitor jack 18 is connected to the terminal 1.
Compensated light receiving amount, which is a value obtained by compensating the current light receiving amount of the light receiving device with a change in the light receiving amount due to contamination of the surface of the sensor cover or the like, is transmitted to the tester 1 through the light receiving device 3 via the light receiving devices 9 and 20. Are monitored and monitored. The tester 1 and the light receiver 3 are composed of a power supply line 21, a fire signal line 22, a failure signal line 23, a ground line 24, a test signal line 25, and a monitor signal line 2.
6 are connected.

The tester 1 and the receiver 6 are connected to a power line 27,
28.

[0008]

However, in such a conventional photoelectric separation type smoke detector and receiving apparatus, the light receiver periodically monitors a change in the amount of received light due to contamination on the surface of the detector. Each time, the received light amount is compensated and the compensation ratio is calculated so that the current received light amount matches the initial value.After that, the current received light amount is multiplied by the compensation ratio to match the initial value. Sends only the compensated received light amount obtained by multiplying the current received light amount and the compensation ratio to the receiver, and outputs the monitor jack in the receiver (the monitor jack 1 in the tester 1 in FIG.
Since the amount of compensated light received could be monitored in step 8), the receiver could not know how much compensation is currently being performed due to dirt on the surface of the sensor cover, and could not determine how dirty the surface of the sensor cover was. Was.

In addition, a signal line for each information is required to send not only the amount of compensated received light but also many other state information. The present invention has been made in view of such a conventional problem, and sends a lot of various state information to a receiving device through a single signal line, and more clearly recognizes the state of a light receiver. It is an object of the present invention to provide a photoelectric separation type smoke detector and a receiving device which can perform the above-mentioned.

[0010]

FIG. 1 is a diagram illustrating the principle of the present invention. The present invention relates to a light transmitter 42 having a light emitting element 53.
And the photodetector 31 having the photodetector 54 are separately arranged to detect light attenuation due to smoke between the photodetectors 31 and the photodetector 3.
In the photoelectric separation type smoke detector that sends various status information to the receiving device 30 from 1, a data output unit 118 that outputs various status information to the light receiver 31 by serial transmission, and receives data from the data output unit 118. A state signal output means 85, 86 for outputting to the device 30 is provided.

Further, the various state information is a current light receiving amount, a compensation ratio, a sensitivity, and an initial value. Further, the present invention relates to a photodetector 31 of a photoelectric separation type smoke detector for separately arranging a light transmitter 42 having a light emitting element 53 and a light receiver 31 having a light receiving element 54 and detecting attenuation of light due to smoke therebetween. In the receiving apparatus 30, which receives various pieces of state information from the user, data analyzing means 113 for sequentially analyzing the various pieces of state information is provided.

Further, a display means 116 for displaying data analyzed by the data analysis means 113 is provided. Further, a storage means 115 for storing data analyzed by the data analysis means 113 is provided.
Further, an output unit 117 for outputting the data stored in the storage unit 115 to the outside is provided.

Further, the receiver 30 is a tester for performing an operation test of the photoelectric separation type smoke detector.

[0014]

According to the photoelectric separation type smoke detector and receiving apparatus 30 of the present invention having such a configuration, the data output means 118 provided in the light receiver 31 transmits various state information to the state signal output means 85 and 86. Is transmitted serially to the receiving device 30 via the receiver, and the receiving device 30 analyzes and displays various state information by the data analyzing means 121. , Sensitivity, and initial values, and the status of the light receiver 31 can be more clearly known.

In addition, since a signal line is not required for each type of status information and only one signal line is required, the configuration is simplified and the cost can be reduced. In addition, since the current compensated light receiving amount and the threshold value can be determined from the sensitivity and the initial value from the current light receiving amount and the compensation ratio, these can be displayed on the display means 116. Further, the data analyzed by the data analysis unit 113 can be stored in the storage unit 115, and the past data and the current data can be compared.

Furthermore, the data stored in the storage means 115 can be taken out from the output means 117 to the outside, and the status of the light receiver 31 can be known from outside.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the receiving device will be described as a tester. 2 to 9 are views showing an embodiment of the present invention.
FIG. 2 is an overall configuration diagram according to an embodiment of the present invention.

In FIG. 2, reference numeral 31 denotes a light receiver of the photoelectric separation type smoke detector, and the light receiver 31 is a light transmitter control line 40,4.
1 is connected to the light transmitter 42 of the photoelectric separation type smoke detector. The light receiver 31 is connected to a receiver 46 via a fire signal line 43, a common line 44, and a failure signal line 45.

Reference numeral 47 denotes a constant voltage / current limiting circuit provided in the photodetector 31. The constant voltage / current limiting circuit 47 receives power from the receiver 46, generates a constant voltage, and limits the current. A constant voltage is supplied to each part. 48
Denotes a light emission control circuit for controlling the light emission operation of the light transmitter 42. The light emission control circuit 48 receives a constant voltage from the constant voltage current limiting circuit 47 via the diode 49, and controls the light emission in accordance with an instruction from the control unit 50. The signal is transmitted to the light transmitter 42 via the light transmitter control line 41.

Reference numeral 51 denotes a light emission control detection circuit provided in the light transmitter 42. The light emission control detection circuit 51 detects a light emission control signal from the light receiver 31 and operates a light emission drive circuit 52. That is, the light emission control detection circuit 51
Then, the power-off control circuit 52 operates to turn off the light-emission drive circuit 52 when a power-off at a fixed interval serving as a light-emission control signal is detected. Therefore, LED
The light emitting element 53 is driven by a light emission driving circuit 52 and emits near-infrared light to the light receiving element 54 of the light receiver 31 in a pulsed manner via a lens.

Reference numeral 55 denotes an optical axis confirming lamp driving circuit provided in the light transmitter 42. The optical axis confirming light driving circuit 55 controls the light emission control signal from the light emission control detecting circuit 51 and opens and closes the cover of the light transmitter 42. Is activated by an open detection signal (OFF signal) from the cover open / close detection switch 70 for detecting the light, and drives and blinks the optical axis confirmation lamp 56 composed of an LED. 37 is the light receiver 3
1 is a distance selection switch composed of a dip switch provided in 1. The distance selection switch 37 outputs a signal that is set according to the monitoring distance and indicates a specified sensitivity to the control unit 50 via the sensitivity input circuit 57. The controller 50 calculates a threshold (fire level) based on the initial value of the light reception output after the cover is closed and the sensitivity setting after the cover is closed, and stores it in the RAM 32 as a reference signal.

The control unit 50 compares the reference signal with the received light signal. If the received light signal is smaller than the reference signal, the control unit 50 determines that a fire has occurred and outputs a fire signal to the fire signal output circuit 71.
Reference numeral 36 denotes a cover open / close detection switch provided in the photodetector 31. The cover open / close detection switch 36 outputs an open detection signal (off signal) when the cover is detected to be open, and a close detection signal (off signal) when the cover is detected to be closed. The ON signal is output to the control unit 50 via the cover opening / closing input circuit 58 and also to the oscillation circuit 59.

The oscillating circuit 59 receives the open detection signal from the cover open / close detection switch 36 and the constant voltage supplied from the constant voltage current limiting circuit 47 to generate a 5 V voltage.
An oscillating operation is performed based on the voltage of 5 V from the constant voltage circuit 60, and an oscillating output is given to the optical axis checking lamp control circuit 61. The optical axis confirmation light control circuit 61 blinks the optical axis confirmation light 33 based on the oscillation output from the oscillation circuit 59 and the open detection signal from the cover opening / closing input circuit 58.

At the time of monitoring, when the control unit 50 detects a fire (for example, a dimming rate of 70% or more continues for a predetermined time),
By outputting the signal to the fire signal output circuit 71, a fire signal is sent to the receiver 46. In this state, even if a failure due to interruption is detected (for example, a dimming rate of 90% or more continues for a predetermined time or more), the control unit 50 does not output a failure signal because a fire has been detected. .

The failure signal output cutoff circuit 62 cuts the failure signal from the control unit 50 based on the output from the fire signal output circuit 71. Basically, the control unit 50 performs
This is not necessary because the failure signal is not output, but is provided so that the failure signal is not output to the receiver 46 even if it is output erroneously. The control unit 50 detects a failure due to the interruption (for example, the dimming rate 90
When% or more continues for a predetermined time or more), the failure signal is output to the failure signal output circuit 63, and the failure signal is sent to the receiver 46.

When a failure due to interruption is detected or when it is detected that normal monitoring cannot be performed, a failure signal is output from the control unit 50, and the failure signal causes the failure indicator light 35 to flash the occurrence of the failure. The fault signal output circuit 63 sends a fault signal to the receiver 46 via the fault signal line 45. On the other hand, when detecting the fire signal from the control unit 50, the fire signal output circuit 71 turns on the fire indicator light 34 via the diode 64 and sends the fire signal to the receiver 46 via the fire signal line 43. .

Numeral 54 denotes a light receiving element composed of a photodiode provided in the light receiver 31. The light receiving element 54 receives near-infrared light emitted from the light emitting element 53 of the light transmitter 42 in a pulsed manner. The light receiving element 54 and the variable resistor 72 constitute a photoelectric conversion circuit 65. The received light signal is transmitted to the photoelectric conversion circuit 65.
Is converted into an electric signal, and is amplified by the amplifier circuit 66. By turning the light reception adjustment knob, the variable resistor 72
By changing the resistance value, the photoelectric conversion voltage is varied to increase or decrease the photoelectric conversion voltage. The analog electric signal amplified by the amplifier circuit 66 is held by the peak hold circuit 73 and then enters the control unit 50 via the received light amount input circuit 74. Control unit 50
Is constituted by an IC and has an A / D converter 68 built therein. The analog electric signal is converted into a digital value by the A / D converter 68.

The control section 50 is provided with a drive table 69 for driving the LED 38 as monitor display means.
38 are respectively driven. Reference numeral 75 denotes a tester. The tester 75 sends a test signal to the light receiver 31 and performs an operation test of the photoelectric separation type smoke detector as a simulated fire state. Always receive status information. The various kinds of information are a fire signal and a failure signal, and the various kinds of state information are a current light receiving amount, a compensation ratio, a sensitivity (dimming rate), and an initial value.

The tester 75 receives power from a nearby AC power supply, but may receive power from the receiver 46. The tester 75 is connected to the signal line 7 for receiving various information.
6. It is connected to the light receiver 31 via a signal line 77 for receiving various state information, a test signal line 78 for transmitting a test signal, and a ground line 79. Various information, that is,
The transmission of the fire signal and the fault signal from the light receiver 31 to the tester 75 requires only one signal line 76 and does not require a dedicated signal line.

The transmission of various state information from the light receiver 31 to the tester 75 does not require a signal line for each state information.
Only one signal line 77 is required. The test signal from the tester 75 enters the control unit 50 via test input detection circuits 80 and 81 as test input detection means, and is determined by the control unit 50. When the control unit 50 determines the test signal, the control unit 50 simulates a fire condition and sends the fire signal to the receiver 46.

The control section 50 is provided with a pulse generation section 82 as pulse generation means.
Generates a pulse having a different pulse width for each type of information.
For example, when the pulse generator 82 indicates a fire signal,
A pulse of 5 ms is generated, and a pulse of 5 ms is generated when a fault signal is indicated. The pulses having different pulse widths generated by the pulse generator 82 are sent to the tester 75 via the transfer output circuits 83 and 84 as the transfer output means.

The control section 50 is provided with a data output section 118 as data output means.
Sends various state information to the tester 75. That is,
The data output unit 118 converts various state information into one digital signal.
The information is sequentially transmitted to the tester 75 by serial transmission, and when all the information is transmitted, the information is repeatedly returned to the first information and transmitted.

The data is sent to the tester 75 at a transfer rate of, for example, 1200 bps.
A / D once every 3 seconds (see arrow A, as shown in FIG.
Sent in synchronization with the conversion command. The pulse width of the data transfer is, for example, 8.33 ms (see arrow B). 1
As shown in FIG. 4, one data is composed of 10 bits of a start bit, data (8 bits), and a parity bit, and five types of data (blocks) are one type (block).
Sent every time. That is, one frame is one block:
Start data, 2 blocks: current light receiving amount, 3 blocks: compensation ratio, 4 blocks: sensitivity, 5 blocks: initial value.

The parity bit is set to be an even parity. Since various status information is sent sequentially, in order to recognize which is the start data,
The parity bit of the start data is changed and the tester 7
Send to 5. If you can recognize the start data,
Thereafter, since it is known that the data (current received light amount, compensation ratio, sensitivity, initial value) in the order is transmitted, various state information can be known in order.

The control section 50 is provided with a sensitivity table 119 as shown in FIG. 5, and the control section 50 reads the A / D converted value converted by the A / D converter 68, and obtains the sensitivity shown in FIG. The sensitivity is determined from the table 119. That is, the sensitivity input circuit 57 has a sensitivity setting resistor connected in series with the reference resistor, switches the sensitivity setting resistor with the distance selection switch 37 and divides the voltage, while the control unit 50 calculates the divided value. The value obtained by A / D conversion by the A / D converter 68 is read, and the sensitivity is determined based on the sensitivity table 119.

The transfer output circuit 83, the test input detection circuit 81 and the status signal output circuit 85 are connected to the ground line 4
4A and a receiver 46 via a common line 44,
Power is supplied from the receiver 46. Notification output circuit 8
4. Test input detection circuit 80, status signal output circuit 86
Receives power from the tester 75. Next, FIG. 6 shows an example of a connection portion between the control unit 50 of the light receiver 31 and the test device 75.

In FIG. 6, the test signal from the tester 75 is input to the terminal TEA of the light receiver 31, passes through the Zener diode 87 and the resistor 88, passes through the photocoupler 89, and is input to the controller 50. Light emitting diode 90 of photocoupler 89
Constitutes a test input detection circuit 80, and the phototransistor 91 constitutes a test input detection circuit 81.

Pulses indicating various kinds of information sent from the control unit 50 pass through a resistor 92 and a photocoupler 93, are inverted by an inverter 94, and thereafter are tested via a terminal S1A.
Sent to The light-emitting diode 95 of the photocoupler 93 forms a transfer output circuit 83, and the phototransistor 96 forms a transfer output circuit 84. Data indicating various state information sent from the control unit 50 is inverted by an inverter 99 via a resistor 97 and a photocoupler 98, and then inverted at a terminal S.
It is sent to the tester 75 via 2A. Photocoupler 98
The light emitting diode 100 constitutes a state signal output circuit 85, and the phototransistor 101 comprises a state signal output circuit 86.
Is composed.

Next, FIG. 7 is an internal configuration diagram of the tester 75. In FIG. 7, I + and Ic are terminals to which an AC power is input. The AC power input through the input terminals I + and Ic is rectified by a rectifier circuit 104 via a zener diode 102 and a diode 103, and then 12V. The constant voltage circuit 105 generates a constant voltage of 12 V and supplies it to each unit, and the 5 V constant voltage circuit 106 generates a constant voltage of 5 V and supplies it to each unit.

Reference numeral 107 denotes a non-lock type test switch. When connected to the contact a during a fire test, a 12 V test signal is transmitted from the terminal TEB to the light receiver 31. 11
9 is a Zener diode which conducts at 15V, for example.
A test signal of 15 V or more is not sent to the light receiver 31 side. When the test switch 107 is connected to the contact b, 5 V power is supplied to the light receiver 31 side. In addition,
Normally, the test switch 107 is connected to the b side.

S1B is a terminal to which pulses having different pulse widths indicating various information are inputted, and the pulse width of the pulse inputted through the terminal S1B is judged by a pulse width judgment circuit 108 as a pulse width judgment means. The voltage of the pulse to be input is prevented from exceeding 15 V by, for example, a zener diode 109 which conducts at 15 V. The pulse width determination circuit 108 determines the pulse width of the input pulse. For example, when the pulse width is 10 ms, various information is determined to be a fire signal, and when the pulse width is 5 ms, the various information is a failure signal. Is determined.

The pulse width determination circuit 108 turns on the red fire lamp 110 as a display means when it is determined that the pulse is a fire signal, and turns on the display means when it is determined that the pulse is a failure signal. The yellow obstacle light 111 is turned on. Reference numeral 112 denotes a reset switch provided as a recovery unit provided in the pulse width determination circuit 108. The reset switch 112 is a non-lock type switch. When the reset switch 112 is pressed for a predetermined time, for example, three seconds, the pulse width determination circuit 108 is restored, and the fire light 110 and the fault light 111 are turned off.

S2B is a terminal to which data indicating various status information is input, and data input through the terminal S2B is sequentially analyzed by the data analysis unit 113 as data analysis means. Reference numeral 114 denotes a Zener diode that conducts at 15 V, for example, so that the voltage input by the Zener diode 114 does not exceed 15 V. In addition, the data analysis unit 113 has a sensitivity table 12 as shown in FIG.
0 is provided, and the received A / D conversion value is used to convert to a sensitivity using the sensitivity table 120.

The data analyzed by the data analysis unit 113 is stored in the memory unit 115 as temporary storage means and displayed on the display unit 116. Further, the data stored in the memory unit 115 can be taken out from an output terminal 117 as an output unit. 118
Is a telephone jack, and the telephone jack 118 is connected so that the tester 75 and the receiver 46 can communicate with each other.

FIG. 8 is a front view of the tester 75.
In FIG. 8, reference numeral 116 denotes the display unit, and the display unit 11
Reference numeral 6 indicates a received light amount, a compensation ratio, a compensated received light amount, a fire level, and an initial value, and the fire light 110 and the obstacle light 111 are respectively turned on. Note that 107 is the test switch.

The various pieces of status information are displayed, for example, in units of% for easy understanding. The current received light amount is 10
If the compensation ratio is 0% and the compensation ratio is -1%, the compensation received light amount is 99%.
Can be represented by Also, the initial value is set to 100%,
Other values can be displayed in% compared to the initial value.
Next, the operation will be described.

The data output unit 118 of the light receiver 31 continuously transmits five types of data, ie, start data, current received light amount, compensation ratio, sensitivity, and initial value once every about three seconds. Various status information includes current received light amount, compensation ratio,
Sensitivity and initial values.
The status of the light receiver 31 is notified by sending it to the tester 75 every second.

First, the start data only needs to change the parity bit, and may be sent in any manner. Here, all data bits are set to 1. Therefore, the start data is all 1 from the start bit to the parity bit. Next, as the current light reception amount, the value obtained by A / D converting the light reception amount received by the light receiver 31 with the A / D converter 68 is sent as it is.

Next, the compensation ratio compensates from -50 to 50%. Also, since the data bits consist of 8 bits, values from 0 to 255 can be sent. Therefore,
As shown in FIG. 9, when the compensation ratio is 0%, the number of data bits is 100, when the compensation ratio is -50%, the number of data bits is 50, and when the compensation ratio is + 50%, the number of data bits is 15.
It is sent to the data analyzer 113 of the tester 75 as 0. Thus, data bits will be sent in the range of 50 to 150. Note that data bits 0 to 49,
Data bits 151 to 255 are unused.

Next, the sensitivity is changed by switching the sensitivity setting resistor provided in the sensitivity input circuit 57 by the distance selection switch 37, dividing the voltage, and dividing the divided value by the A / D converter 68.
/ D conversion and sends the A / D conversion value. That is, the sensitivity setting resistor is provided in the sensitivity input circuit 57, the sensitivity setting resistor is connected in series with the reference resistor, the sensitivity setting resistor is switched by the distance selection switch 37, and the divided voltage is A / D converted. Control unit 5 using the A / D converted value as the sensitivity.
Sent to 0.

The control unit 50 reads the A / D converted value and determines the sensitivity based on the sensitivity table 119 as shown in FIG. For example, if the A / D converted value obtained by voltage division and A / D conversion by the sensitivity input circuit 57 is 35, the control unit 50 determines that the sensitivity is 15%. The A / D conversion value is 00
In the case of ~ 31, the control unit 50 determines that the state is the adjustment state.

The sensitivity value sent from the data output unit 118 of the control unit 50 to the tester 75 is the A value converted by the A / D converter 68.
The / D conversion value is sent as it is, not the sensitivity obtained from the sensitivity table 119. Therefore, the sensitivity table 120 similar to that provided in the light receiver 31 is also provided in the tester 75.
The tester 75 can know the sensitivity from the sensitivity table 120 in the tester 75.

The data output unit 118 may send the sensitivity value obtained from the sensitivity table 119 to the tester 75, and the tester 75 may read and display the sensitivity. Next, as the initial value, a value is directly sent, such as the current amount of received light. Thus, the data output unit 118 transmits five types of data for each type, and repeats this.

Next, the various information is sent to the data output unit 118.
And enters the tester 75 via the state signal output units 85 and 86. The various state information input to the test device 75 is sequentially read and analyzed by the data analysis unit 113. The data analyzer 113 calculates the sensitivity A
For the / D conversion value, using the sensitivity table 120,
Convert to sensitivity.

The data read and analyzed by the data analysis unit 113 is displayed on the display unit 116. Displaying the data as A / D converted values is difficult to understand.
As shown in (2), it is easier to understand when displayed in units of%. For example, the current received light amount is 99% and the compensation ratio is 1
%, The compensation light receiving amount is 99%, the fire level is 70%, and the initial value is 100%. That is, the initial value is 100%
The other values are displayed in comparison.

The data analyzed by the data analysis unit 113 is stored in the memory unit 115. Therefore,
Past data and current data can be compared.
Further, the data stored in the memory unit 115 can be taken out from the output terminal 117, and the status of the light receiver 31 can be known outside. Thus, the control unit 5
Since the various status information is output from the data output unit 118 of “0” and analyzed by the data analysis unit 113 of the tester 75, not only the amount of received light but also the amount of current received light, Since the ratio, the sensitivity, and the initial value can be obtained, the status of the light receiver 31 can be clearly known. Therefore, when the element is very dirty, it can be replaced at an early stage.

Further, since a signal line is not required for each type of status information and only one signal line is required, the configuration is simplified and the cost can be reduced. In the present embodiment, various state information is transmitted from the light receiver to the tester. However, the present invention can be applied to any display device such as a receiver that analyzes and displays various state information and any alarm device. .

[0058]

As described above, according to the present invention, various status information is serially transmitted one by one by the data output means of the light receiver, and the various status information transmitted by the data analysis means of the receiving device. Was analyzed.
The situation of the amount of received light can be more clearly known. Further, since only one signal line is required, the configuration is simplified and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is an overall configuration diagram according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a data transmission method.

FIG. 4 is a configuration diagram of data.

FIG. 5 is a diagram showing a sensitivity table.

FIG. 6 is a diagram illustrating an example of a connection unit between a control unit of a light receiver and a tester.

FIG. 7 is an internal configuration diagram of a tester.

FIG. 8 is a front view of the tester.

FIG. 9 is a diagram showing a relationship between a compensation ratio and a value of a data bit.

FIG. 10 shows a conventional example.

[Explanation of symbols]

30: Receiving device 31: Optical receiver 32: RAM 33, 56: Optical axis confirmation light 34: Fire indicator light 35: Fault indicator light 36, 70: Cover open / close detection switch 37: Distance selection switch 38: LED 40, 41: Send Light control line 42: Light transmitter 43: Fire signal line 44: Common line 44A: Ground line 45: Fault signal line 46: Receiver 47: Constant voltage current limiting circuit 48: Light emission control circuit 49, 64: Diode 50: Control unit 51: light emission control detection circuit 52: light emission drive circuit 53: light emission element 54: light reception element 55: optical axis confirmation light drive circuit 57: sensitivity input circuit 58: cover open / close input circuit 59: oscillation circuit 60: 5V constant voltage circuit 61: optical axis confirmation light control circuit 62: failure signal output cutoff circuit 63: failure signal output circuit 65: photoelectric conversion circuit 66: amplifier circuit 68: A / D converter 69: Motion table 71: Fire signal detection circuit 72: Variable resistor 73: Peak hold circuit 74: Light reception amount input circuit 75: Tester 76, 77: Signal line 78: Test signal line 79: Ground line 80, 81: Test input detection circuit (Test input detecting means) 82: Pulse generator 83, 84: Notification output circuit 85, 86: State signal output circuit (State signal output means) 87: Zener diode 88, 92, 97: Resistance 89, 93, 98: Photocouplers 90, 95, 100: Light-emitting diodes 91, 96, 101: Phototransistors 94, 99: Inverters 102, 109, 114, 119: Zener diode 103: Diode 104: Rectifier circuit 105: 12V constant voltage circuit 106: 5V constant voltage Circuit 107: Test switch 108: Pulse width judgment circuit 110: Fire 111: Obstruction light 112: Reset switch 113: Data analysis unit (data analysis unit) 115: Memory unit (storage unit) 116: Display unit (display unit) 117: Output terminal (output unit) 118: Data output unit (data output) Means) 119, 120: sensitivity table

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G08B 17/00-17/12 G01N 21/53 G01N 21/59

Claims (7)

(57) [Claims] 1. A light transmitter having a light emitting element and a light receiver having a light receiving element are separately arranged to detect light attenuation caused by smoke therebetween, and various state information is transmitted from the light receiver to a receiving device. In the photoelectric separation type smoke sensor, the light receiver is provided with data output means for outputting the various state information by serial transmission, and state signal output means for outputting data from the data output means to the receiving device. A photoelectric separation type smoke detector characterized by the above-mentioned. 2. The photoelectric separation type smoke detector according to claim 1, wherein said various state information is a present light receiving amount, a compensation ratio, a sensitivity and an initial value. 3. A photoelectric separation type smoke sensor for detecting light attenuation due to smoke between a light transmitter having a light emitting element and a light receiver having a light receiving element, and various kinds of status information from the light receiver. , A data analyzing means for sequentially analyzing the various status information. 4. The receiving apparatus according to claim 3, further comprising a display unit for displaying data analyzed by said data analyzing unit. 5. A storage means for storing data analyzed by said data analysis means.
The receiving device according to the above. 6. The receiving apparatus according to claim 5, further comprising output means for outputting the data stored in said storage means to the outside. 7. The receiving apparatus according to claim 1, wherein said receiving apparatus is a tester for performing an operation test of said photoelectric separation type smoke detector.